14-1
IM 701730-01E
Rear Panel Auxiliary I/O Section
14
14.1 External Trigger Input, External Clock Input,
and Trigger Gate Input
CAUTION
Only input signals that meet the specifications below. Otherwise, undesirable
signals such as excessive voltage may damage the instrument.
External Trigger Input Terminal
This terminal is used when an external signal is used as a trigger source (see section
6.6). This terminal is also used as the external clock input terminal (EXT CLOCK IN) and
the trigger gate input terminal (TRIG GATE IN).
On the DL1735E/DL1740E/DL1740EL, the terminal is labeled EXT CLOCK IN/EXT TRIG
IN/TRIG GATE IN (rear panel), and on the DL1720E it is labeled EXT (front panel).
Item
Description
Connector type
BNC
Maximum input voltage
±
40 V (DC+ACpeak) or 28 Vrms when the frequency is 10 kHz or
Input frequency bandwidth
DC to 100 MHz
Input impedance
Approximately 1 M
Ω
and approximately 20 pF
Input range
±
2 V (for the DL1735E/DL1740E/DL1740EL)
±
1 V (when the
±
1 V range is set on the DL1720E)
±
10 V (when the
±
10 V range is set on the DL1720E)
Trigger sensitivity
0.1 Vp-p (for the DL1735E/DL1740E/DL1740EL)
±
0.1 Vp-p (when the
±
1 V range is set on the DL1720E)
±
1 Vp-p (when the
±
10 V range is set on the DL1720E)
Trigger level
±
2 V, setting resolution is 5 mV (on the DL1735E/DL1740E/
DL1740EL)
±
1 V, setting resolutions of 5 mV (when the
±
1 V range is set on
the DL1720E)
±
10 V, setting resolutions of 50 mV (when the
±
1 V range is set on
the DL1720E)
[Input terminal]
1M /20pF 40Vpk
<_
EXT.
EXT CLOCK IN
EXT TRIG IN
TRIG GATE IN
40Vpk 1M
GO/
NO-GO
TRIG OUT
(TTL )
PROBE POWER ( 12V DC )
A
B
C
<
_
For the DL1735E/DL1740E/
DL1740EL
(terminal on the rear panel)
For the DL17420E
(terminal on the front panel)
Chapter 14
Rear Panel Auxiliary I/O Section
